Lol, he's a Vet and only has 1 post.There is one hidden star on the Star castle challenge, you know the part where you slide all the way to the end and theres a box with a star in it? Well there's two of them in that level. When you go on the slide, the timer starts, try to reach to the end as fast as you can within 21 seconds, if you got to the end within 21 seconds, a star will appear. If you dont beat the time, it wont pop up. If your talking about the 7th hidden star in each course, then you have to collect all the coins to make it pop. I dont know why I bothered postin this since he wont come back.